From 80c5606c3b45e0176c32d3108ade1e1cb0b954f3 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sun, 15 Oct 2006 14:09:55 -0700 Subject: Fix VM_MAYEXEC calculation .. and clean up the file mapping code while at it. No point in having a "if (file)" repeated twice, and generally doing similar checks in two different sections of the same code Signed-off-by: Linus Torvalds --- mm/mmap.c | 21 ++++++++++----------- 1 file changed, 10 insertions(+), 11 deletions(-) (limited to 'mm') diff --git a/mm/mmap.c b/mm/mmap.c index eea8eefd51a..497e502dfd6 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -900,17 +900,6 @@ unsigned long do_mmap_pgoff(struct file * file, unsigned long addr, int accountable = 1; unsigned long charged = 0, reqprot = prot; - if (file) { - if (is_file_hugepages(file)) - accountable = 0; - - if (!file->f_op || !file->f_op->mmap) - return -ENODEV; - - if ((prot & PROT_EXEC) && - (file->f_vfsmnt->mnt_flags & MNT_NOEXEC)) - return -EPERM; - } /* * Does the application expect PROT_READ to imply PROT_EXEC? * @@ -1000,6 +989,16 @@ unsigned long do_mmap_pgoff(struct file * file, unsigned long addr, case MAP_PRIVATE: if (!(file->f_mode & FMODE_READ)) return -EACCES; + if (file->f_vfsmnt->mnt_flags & MNT_NOEXEC) { + if (vm_flags & VM_EXEC) + return -EPERM; + vm_flags &= ~VM_MAYEXEC; + } + if (is_file_hugepages(file)) + accountable = 0; + + if (!file->f_op || !file->f_op->mmap) + return -ENODEV; break; default: -- cgit v1.2.3